Change MemberTypeInformation.member type to MemberEntity

pkg/compiler/lib/src/inferrer/type_graph_nodes.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library compiler.src.inferrer.type_graph_nodes;
 
 import 'dart:collection' show IterableBase;
 
 import '../common.dart';
 import '../common/names.dart' show Identifiers;
@@ skipping 375 matching lines @@
    * A call site is either an AST [ast.Node], an [Element] (see uses of
    * [synthesizeForwardingCall] in [SimpleTypeInferrerVisitor]).
    *
    * The global information is summarized in [cleanup], after which [_callers]
    * is set to `null`.
    */
   Map<MemberEntity, Setlet<Spannable>> _callers;
 
   MemberTypeInformation._internal(this._member) : super._internal(null);
 
-  MemberElement get member => _member;
+  MemberEntity get member => _member;
 
   String get debugName => '$member';
 
   void addCall(MemberEntity caller, Spannable node) {
     assert(node is ast.Node || node is Element);
     _callers ??= <MemberEntity, Setlet<Spannable>>{};
     _callers.putIfAbsent(caller, () => new Setlet()).add(node);
   }
 
   void removeCall(MemberEntity caller, node) {
@@ skipping 1482 matching lines @@
     // TODO(ngeoffray): Narrow to bound.
     return type;
   } else {
     ResolutionInterfaceType interfaceType = annotation;
     otherType = new TypeMask.nonNullSubtype(interfaceType.element, closedWorld);
   }
   if (isNullable) otherType = otherType.nullable();
   if (type == null) return otherType;
   return type.intersection(otherType, closedWorld);
 }